【资料名称】：ITU-T G.9954 MAC层协议(HPNA3.0)

【资料作者】：不详

【资料日期】：2010.10

【资料语言】：中文

【资料格式】：DOC

【资料目录和简介】：

• PHY-layer payload transmission rates of 4 – 240 Mbit/sec.
• Rate adaptive transceivers that optimize data rates and packet error rates for dynamically varying
channel conditions on a per-packet basis.
• Frequency Diverse QAM for robust communication over highly frequency selective channels.
• Spectrum notching for compatibility with Amateur Radio services.
• Synchronous MAC protocol controlled by a dynamically elected master employing a combination of
collision avoidance and controlled contention-based access strategies.
• Support for isochronous and asynchronous data services.
• Peer-to-Peer communication within a master-controlled network.
• Master-less mode of operation using G.989.1/2-like asynchronous MAC protocol.
• Packet aggregation (packetization) performed within the G.9954 protocol stack layer up to latency
limits of the service flow and available transmission bandwidth.
• Quality of Service guarantees for bandwidth, jitter, latency and BER.
• QoS support for services with explicit traffic and rate specifications providing a link layer that is
well suited for streaming audio and video.
• Protocol-specific convergence layers.
• Backward Compatible with G.989.1/2, allowing transmissions at G.989.1/2 compatibility mode
rates.
• Coexistence and interoperability between G.989.1/2 and G.9954 devices in a mixed network.
• Compatibility with other phoneline services such as POTS, V.90, ISDN and G.992.1, G.992.2,
G.992.3, and G.992.4.
• Local and remote management of G.9954 devices.
• Provisions for future security extensions.